Electric welder.



W. A. SMITH.

ELECTRIC WELDER.

APPLICATION HLED JULY 19, 1915.

1,184,782. Patented May 30,1916.

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W. A. SMiT ELECTRIC WELDER.

APPucAnou FILED JULY \9,1e15.

Patented May 30, 1916.

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THE COLUMBIA PLANDGRAPH c0., WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

WENTWORTH A. SMITH, OF WINDSOR, ONTARIO, CANADA, ASSIGNOR TO DETROITELECTRIC WELDER COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OFMICHIGAN.

ELECTRIC WELDER.

Application filed July 19, 1915.

To all whom it may concern Be it lmown that I,WENT'WORTH A. SMITH, acitizen of the Dominion of Canada, residing at WVindsor, in the countyof Essex and Province of Ontario, Canada, have invented a new and usefulElectric WVelder, of which the following is a specification.

This invention relates to adjustable supporting devices for chucks orwork' holders for electrical butt-welding machines, that is, machinesfor welding rods or bars of metal end-to-end, and its object is torovide a device'by means of which the ro s or bars to be welded may bequickly brought into correct alinement.

This invention consists, in an electric welder, in combination with awork holder, of a plurality of eccentrically mounted cylindricalsupports therefor, and means for adjustably positioning the supports.

It also consists of a pair of eccentric sleeves, one within the other,under each side of one of the work holders of a welding machine, theplanes passing through the cenof Fig. 1.

ters of said eccentrics of each pair being normally at an angle to eachother.

It further consists in the details of construction illustrated in theaccompanying drawings and particularly pointed out in the claims.

In the drawings, Figure 1 is a plan of the work table of an electricbutt-welding machine. Fig. 2 is a section on the line 22 Fig. 3 is anelevation of the left end of the machine. Fig. 4 is a section on theline 4-4 of Fig. 2.

Similar reference characters refer to like parts throughout the severalviews.

The main frame 1 of the machine supports the table 2 provided withguides 3 and gibs 4, between which the plate 5 is slidable. This platecarries the lower member 6 of a chuck or work holder, the ears 7 throughwhich the bolt 9 extends, and the uprights Specification of LettersPatent.

Patented May 30, 1916.

Serial No. 40,652.

in order to pull down the front end of the lever 12 and thus press downthe upper member 14 of the chuck onto the work in the groove 19.

A pair of ears 21 (Fig. 2) extend down from the lower side of the plate5 and carry a pin 22 on which one end of a link 23 is pivoted. Bearings24 on the table 2 carry a shaft 25 on the front end of which is anoperating handle 26 and on which also, in termediate its ends, is acrank 27 having a crank pin 28 to which the other end of the link 23 isconnected. The operator can place one of the rods or bars to be unitedin the groove 19, swing down the handle 17 to bring the upper member 14of the chuck onto said piece of work, and then move the work and chucktoward the other chuck by means of the operating handle 26.

The details of the parts thus far described form no part of the presentinvention and may be replaced by any other desired structures havingsimilar functions.

A second chuck which is not movable longitudinally of the rods or barsto be welded is mounted on a plate 30, and consists of a bottom member31 (Fig. 3), and top member 32 suspended on the pin 33 carried by thelever 34. This lever is pivoted on the pin 35 mounted in the ears 36 onthe plate 30 and guided at its front end between the upper ends of theuprights 18 also on this plate. The lever and chuck member 32 may bedepressed by means of a cam 16, mounted on the pin 15 and provided witha handle 17, all similar to the work holder previously described, ifdesired.

It is usually necessary that the rods or bars in the grooves 41 in thechuck member 31 shall be in perfect alinement with the rods or bars inthe groove 19. This alinement may be obtained by providing means forraising and lowering the plate 30 and for moving it transversely in asubstantially horizontal plane. To accomplish this the followingdescribed novel mechanism is provided. The table 2 is formed with an endbar 42 and intermediate cross bar 43. These bars are each provided withtwo holes, preferably evenly spaced, to receive the journal sleeves 44and 45 which extend eccentrically into the cylinders 46, which cylindersthereby become eccentrics. Rods 47 extend through these journals andeccentrics and hold .the crank arms 48- on the outer journals 44.'Linkage 49 connects the pins 50 at the lower ends of these crank arms tothe operating lever 52 by means of the bolt 53 which also passes througha slot 54 in the 1 crank arms 61 extend downwardly and carry the pins 62at their lower ends. Linkage 63 connects to these pins and to the bolt64 extending through a hole in the lever 65 and the slot 66in thequadrant 67, mounted on the frame 1. A nut 68 on this bolt 64 may beused to lock the lever 65 and eccentrics 60 in any desired position. Thelever is pivoted on the pin 69 carried by the brackets 70. Extendingdown from the plate 80 are four ears 72, two for each eccentric 60, eachconstituting a bearing, in which these eccentrics are journaled. Themode of assembling this device and its operation are as follows.

The eccentrics 46 are slipped into the eccentrics 60 and these in turnare slipped into the holes in the ears 72 below the plate 30, and thewhole device is lowered into place in the opening in the table 2. Thejournals 44 and are then slipped through the bearing holes in the bars42 and 43, the crank arms 48 are mounted on the journal .44 and the rods47 are inserted to lock the journals'in place in the eccentrics 46. The

links are then connected tothe crank arms 48 and 61 and to the levers 52and 65, whereupon the device is in operating condition.

. In Fig. 1 the outer eccentrics are shown to normally have theircenters in vertical planes and the inner eccentrics 46 are shown to havetheirs normally in a horizontal plane, but this is merely .a matter ofchoice as they can be reversed or modified as desired. As the levers 52and 65 have been swung out a few degrees, the eccentrics 46 and 60 havebeen turned to the left the same amount, the eccentrics 52 therebyraising the plate 30 and the chuck a short distance and the eccentrics60 carrying the plate 30 about the same amount to the left. By shiftingthese levers the plate 30 and chuck can be shifted back and forth andlifted or lowered as the operator may desire. The

' operating levers may be at either the front or back of the machine andany other able plate to support one of the work hold- 'ers, a secondplate to support the second work holder, said second plate having down--wardly extending ears, a pair of eccentrics journaled in said ears,supporting means for said eccentrics, and means to turn the eccentricsin said ears whereby the table may be shifted. I

2. In a butt-welding machine, the combination of a table having anaperture, a plate positioned within the aperture and having two pairs ofdownwardly extending ears constituting bearings, a work engaging deviceon the plate, an eccentrically bored sleeve journaled in each pair ofears, an eccentrically bored cylinder in each of said sleeves, journalsmounted in the ends of the inner eccentrics and in proper bearings inthe table, and means to move the pairs of eccentrics'to, shift saidplate. 7

3. In a butt-welding machine, the combination of a table having anaperture, aplate positioned within the aperture and having two pairs ofdownwardly extending ears constituting bearings, a work engaging deviceon the plate, an eccentrically bored sleeve journaled in each pair ofears, an eccentrically bored cylinder in each of said sleeves, journalsmounted in the ends of the inner eccentrics and in proper bearings inthe table, an arm connected to each eccentric, means connected to thearms on the innor eccentrics to move them within the outer eccentrics,and means connected to the arms on the outer eccentrics to move themwithin said ears.

4. In a butt-welding machine, the combination of a table having anaperture, a plate positioned within the aperture and having two pairs ofdownwardly extending ears constituting bearings, a work engaging deviceon the plate, an eccentrically bored sleeve journaled in each pair ofcars, an cecentrically bored cylinder in each of said sleeves, journalsmounted in the ends of the inner eccentrics and in proper bearings inthe table, and means to move the pairs of eccentrics to shift saidplate, the planes passing through the centers of said eccentrics beingnormally at an angle to each other.

5. In a buttwelding machine, the combination of a table having parallelcross bars each provided with two holes constituting bearings, journalsleeves mounted in the bearings, a pair of cylinders having their endsdrilled off-center to receive said jourcrank arm connected to eacheccentric sleeve,

means connected to said crank arms on the eccentric sleeves to causethem to move simultaneously, a work holder above the eccation in thepresence of two subscribing centrics, and projections on said workholder witnesses. in such engagement with the eccentric sleeves thatmovement of the cylinders or WENTWORTH SMITH eccentric sleeves willcause transverse move- Witnesses: ment of the work holder. HUGO W.KREINBRING,

In testimony whereof I sign this specifi- EDWARD N. PAGELSEN.

coplel of this patent may be obtained tor five cents each, by addressingthe "Commissioner or Patentl, walhington, D. G.

